Did you ever make a mixtape for a friend or lover? For sure, a great way to express yourself in song, spread the musical wealth. Now you can teach your whole (social networked) world to sing - or at least hear what's humming in your head - in a much more efficient, high tech fashion, by sharing your music streaming habits on Facebook.

Announced at Facebook's F8 Developers Conference by company founder Mark Zuckerberg, Facebook Music isn't really a service unto itself.

Rather, it's a new feature of Facebook's "Open Graph" authenticating/connecting skill set, which makes going to Facebook more useful and exciting.

Users can link in any digital music service that they subscribe to by clicking the "add" button on Timeline, Facebook's new wall. Thereafter, they can automatically post a song, album, radio channel or artist they're listening to, so other Facebook friends can then click and hear the same music.

Both parties in this scenario have to be subscribers to the same music streaming service, to enjoy the instant gratification. But if you're not already on the same subscription wavelength, that first click-to-listen will take you to a site to sign up for either a free membership or a free trial of a by-the-month, all-you-can-listen-to offering - a $5 to $15 proposition and well worth it if you're a music freak.

Zuckerberg demonstrated Facebook Music with Spotify, the streaming service that's been most successful worldwide at signing up users through social networking. But the Facebook feature also will work with the likes of Rhapsody (which will offer newcomers a most generous free sampling of its immense library on your tablets, mobile phones and dedicated music players) as well as Rdio and MOG (now upping the free music perks if you socially market the service.). Free music faves Slacker and iHeartRadio are on board too, along with Deezer, Songza, SoundCloud and MixCloud, though I haven't seen mentions of Pandora and Napster participating.

But wait, there's more. You'll also be able to share your favorite music videos on Facebook through Vevo - a music industry-backed rival of YouTube. And if you want, Facebook friends can be alerted to your concert going plans, when you buy tickets from Ticketmaster, Ticketfly, Eventbrite and ScoreBrite.

"We're going to expand the industries and products that are inherently social to be even more so, and rethink industries at the same time," Zuckerberg declared.

And maybe give the pumped up, cloud-based entertainment offerings coming from Amazon, Apple and Google a good run for the money.

Late flash - Amazon introduces its first color, multimedia serving Kindle next Wednesday!